HYDROSPHERE
hydrosphere
(noun) the watery layer of the earth’s surface; includes water vapor
Source: WordNet® 3.1
Etymology
Noun
hydrosphere (plural hydrospheres)
All the waters of the Earth, as distinguished from the land and the gases of the atmosphere.
Source: Wiktionary
Hy"dro*sphere, n. [Pref. hydro-, 1 + sphere.]
1. (Meteor.)
Definition: The aqueous vapor of the entire atmosphere.
2. (Phys. Geog.) The aqueous envelope of the earth, including the
ocean, all lakes, streams, and underground waters, and the aqueous
vapor in the atmosphere.
Source: Webster’s Unabridged Dictionary 1913 Edition